- Constructed with blue anodized Aluminum
- Block hings open to allow upper receiver to slide on
- Locks receiver into place and provides a sturdy block to maintain your upper or build a new upper
- Guide hole in the block also can act as a bore brush guide
The modular upper receiver block can be used in several ways for many different maintenance tasks. You may use just the lower half of the block by attaching it quickly to the upper receiver with the two provided receiver pins. This allows you to clamp the AR upper receiver to a vise for maintenance work.
Bolting the two halves of the upper receiver block fully supports the upper receiver to prevent damage from torque twisting forces when installing or removing barrels from the receiver.
The upper half of the block inserts into the receiver just like a bolt carrier group. The bottom half of the block can be bolted together with the upper half with the provided steel bolts. This fully supports the inside and the bottom of the receiver and it also leaves the receiver optics rail open for mounting accessories and optics. Unlike other upper receiver blocks that bolt/clamp to the exterior of the AR receiver.
The upper receiver block also has a hole through the length of the block to act as a bore brush guide for cleaning out the bore of the barrel.
Manufacturer: VISM by NcStar
Fits most real AR-15 upper receivers Material:
About NcSTAR / VISM
Founded in Southern California in 1997, NcSTARs mission is to consistently provide superior quality optics and sporting accessories at affordable prices. We are dedicated to providing superb customer service, setting the highest standard in the industry, with a warranty that is second to none. We provide innovative and cutting edge optics and accessories by following the latest industry trends and listening to our customers feedback.Started in 2010 VISM, a division of NcSTAR, was launched out of the desire to create a new brand of products with higher end features and innovation that our customers desire along with the same great warranty and high standard of customer service.
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